database/mariadb-columnstore-engine
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MCOL-5477 Disk join step improvement.

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This patch:
1. Handles corner case when the bucket exceeded the memory limit, but we cannot redistribute the data in this bucket into new buckets based on a hash algorithm, because the rows have the same values.
2. Adds force option for disk join step.
3. Add a option to contol the depth of the partition tree.
This commit is contained in:
Denis Khalikov
2023-05-15 16:44:06 +03:00
parent 375d162376
commit 1f190a6e75
13 changed files with 309 additions and 165 deletions
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3
dbcon/mysql/ha_mcs_execplan.cpp
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@ -6640,7 +6640,8 @@ void setExecutionParams(gp_walk_info& gwi, SCSEP& csep)
csep->djsSmallSideLimit(get_diskjoin_smallsidelimit(gwi.thd) * 1024ULL * 1024);
csep->djsLargeSideLimit(get_diskjoin_largesidelimit(gwi.thd) * 1024ULL * 1024);
csep->djsPartitionSize(get_diskjoin_bucketsize(gwi.thd) * 1024ULL * 1024);
csep->djsMaxPartitionTreeDepth(get_diskjoin_max_partition_tree_depth(gwi.thd));
csep->djsForceRun(get_diskjoin_force_run(gwi.thd));
if (get_um_mem_limit(gwi.thd) == 0)
csep->umMemLimit(numeric_limits<int64_t>::max());
else